WLAN Substrate Integrated Waveguide Filter with Novel Negative Coupling Structure

Document Type : Research Paper

Authors

1 Department of Electrical Engineering, Semnan University, Semnan, Iran

2 Iran University of Science and Technology, Tehran, Iran

Abstract

A fourth-degree Substrate Integrated Waveguide (SIW) crossed coupled band pass filter for WLAN band is designed by using a new negative coupling structure. It consists of two U shape microstrip lines on top and bottom planes with via holes at the center of them. This paper investigates the phase characteristics of negative and positive coupling structures and their effects. The design, fabrication and testing processes of the proposed filter are presented. The measured results seem to be consistent with the results obtained from simulator packages.

Keywords


  • Receive Date: 25 May 2014
  • Revise Date: 29 December 2014
  • Accept Date: 01 January 2015
  • First Publish Date: 01 March 2015